Zip Code 31561 — Sea Island, GA
31561 is a ZIP Code associated with Sea Island, GA, located within Glynn. 31561 ranks #6 out of 7 ZIP codes in Glynn County by population (and #710 out of 750 in GA). The area supports an estimated population of 96 residents across Data Pending housing units, with a population density of 7.9 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (31.201990, -81.337300)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 31561 |
| Primary City | Sea Island |
| State / Province | GA |
| County | Glynn |
| Total Population | 96 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 7.9 people/sq mi |
| Timezone | America/New_York |
How 31561 Compares
| Metric | ZIP 31561 | Glynn County | GA State Average |
|---|
| Population | 96 | 85,286 (Total) | 10,940,417 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 7.9 /sq mi | -- | -- |
| County Pop Rank | #6 of 7 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →